Biology/Physics ATP Preparation Thread

[sksuriza]

hey if we r to plan and experiment on investigation of conc. of fertilizer on growth of plant wt kind of plant should we use?

 

[KarachiRocker]

Any plant except WATER PLANT. Because you just have to comment on their growth and leaf color. So GREEN PLANTS to be specific

 

[sksuriza]

and ya do u have any tips on atp paper?
i m getting insane due to burden!

 

[KarachiRocker]

Go through this topic I am sure this will help you. Cheers

viewtopic.php?f=25&t=6754

 

[sksuriza]

thnks

 

[sksuriza]

hey telll me whch papers did u prepare..?
n do u no ths year the stress is on food n plant test...... my sis will confirm it n i lll let u no here..

 

[SAUD ASLAM]

http://www.xtremepapers.me/CIE/index.ph ... 9_qp_6.pdf
Q3b,can any one help me.
I did not understand even from markingscheme

 

[KarachiRocker]

@sksuriza. I havent done past papers till now. I am studying for other subjects. And btw, your sister will confirm from where ??

 

[sksuriza]

@saud aslam ya i ll tll u

 

[sksuriza]

@ saud aslam hey u want whole questin???


@karachi rocker: i asked her to inquire abt as practical...... hey usually use sme chap!!

 

[KarachiRocker]

Are you talking about the GUESS PAPER ?

 

[SAUD ASLAM]

Only last part .

 

[sksuriza]

@saud aslam
here u have to concentrate on ur knowledge abt heredity
n genetics....

here 1st u have to get a variety of seeds ie of different sizes....
grown from the same plant.....keep in notice tht all the other conditions should be kept constant to make a comparison....ie plants whose seed r taken should be grown at sme temp n soil concentaration.
but only one should be changed at a time ie u can change any 2 factors u like


once u have collected the seed u can compare them easily.,.....
u should record their sizes in tabular form n graph form.,.....
once u have achieved it u will notice that all the seed have lengths in the same range regardless of tall or small parents........





does it help or should i approach in a different way?

 

[sksuriza]

well... she says tht it ws urine test n plan diagram of a plant cell... so i m guessing......

tht the struture of a root or leaf is inportant in aspect of labelling....
n ya tht glucose oxidase n per oxidase may come!!!!


its just a guess....1>!!

 

[SAUD ASLAM]

what the qs what us to do and how we are proving the statement is true?

 

[KarachiRocker]

Urine Test ??? What do we have to do by taking a sample of urine ?? Reducing sugar... ?? To check out whether a person is diabetic or not ??
Oh labeling. I will revise that.
Glucose Oxidase ? Whats that ?

 

[SAUD ASLAM]

marking scheme says variation which single genotype.This could only be achieved due to environment,which are to prove wrong

 

[abcde]

http://www.xtremepapers.me/CIE/index.php?dir=Cambridge%20O%20Levels/5090%20-%20Biology/&file=5090_w09_qp_6.pdf
Q3b,can any one help me.
I did not understand even from markingscheme

Same number of shorter bean seeds and larger bean seeds are sown in a field with equal spacing. The soil is prepared by ploughing, adding water, and adding fertilizers in a uniform way before sowing. All other conditions such as light intensity, temperature and water supply at specific intervals are kept constant. When the plants develop seeds, the same number of seeds are collected as a sample and their length is measured. A table for the lengths of both shorter and longer bean seeds is made. The mean length of the seeds initially obtained from the shorter bean seeds will be less as compared to the ones obtained from larger bean seeds. For greater accuracy, the experiment should be repeated several times and the average lengths found out. This shows that "shorter bean seeds" is an inherited trait controlled by specific genes.
Hope this helped.

 

[KarachiRocker]

@abcde. You copied the answer from Redspot book, eh ?

 

[abcde]

Yes but I added some other points, too. It was just for SAUD' s clarification.